<template>
    <div class="header-container">
        <div class="header-left flex-box">
            <el-icon class="icon" size="20" @click="store.commit('collapseMenu')">
                <Fold />
            </el-icon>
            <ul class="flex-box">
                <li v-for="(item, index) in selectMenu" 
                :key="item.path"
                :class="{selected: route.path === item.path}"
                class="tab flex-box">
                <el-icon  size="12"><component :is="item.icon" /></el-icon>
                <router-link class="text flex" :to="{ path:item.path}">
                    {{ item.name }}
                </router-link>
                <el-icon  size="12" class="close" @click="closeTab(item, index)"><Close /></el-icon>
                </li>
            </ul>
        </div>
        <div class="header-right">
            <el-dropdown @command="handleClick">
                <div class="el-dropdown-link flex-box">
                    <el-avatar 
                    :src="userInfo.avatar" 
                    />
                    <p class="user-name">{{userInfo.name}}</p>
                </div>
                <template #dropdown>
                    <el-dropdown-menu>
                        <el-dropdown-item command="cancel">退出</el-dropdown-item>
                    </el-dropdown-menu>
                </template>
            </el-dropdown>
        </div>
    </div>
</template>
<script setup>
import { computed } from 'vue';
import { useStore } from 'vuex';
import { useRoute, useRouter } from 'vue-router'
//拿到store的实例
const store = useStore();
//当前路由对像
const route = useRoute()
const router = useRouter()

const selectMenu = computed(() => store.state.menu.selectMenu)

const userInfo = JSON.parse(localStorage.getItem('pz_userInfo'))

//点击关闭tab
const closeTab = (item, index) => {
     store.commit('closeMenu', item)
     //删除非当前页tab
     if (router.path !== item.path){
        return
     }
     const selectMenuData = selectMenu.value
     //删除最后一项
     if (index === selectMenuData.length){
         //如果tab只有一个元素
         if (!selectMenu.length){
            router.push('/')
         } else {
            router.push({
                path: selectMenuData[index - 1].path
            })
         }
    } else { //如果删除的是中间的位置
        router.push({
                path: selectMenuData[index].path
            })
     }
}

const handleClick =(command)=>{
    if (command === 'cancel'){
        localStorage.removeItem('pz_token')
        localStorage.removeItem('pz_userInfo')
        localStorage.removeItem('pz_v3pz')
        window.location.href = window.location.origin
    }

}
</script>
<style lang="less" scoped>
.flex-box {
    display: flex;
    align-items: center;
    height: 100%;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    background-color: #fff;
    padding-right: 25px;

    .header-left {
        height: 100px;

        .icon {
            width: 45px;
            height: 100%;
        }

        .icon:hover {
            background-color: #f5f5f5;
            cursor: pointer;
        }
        .tab {
            padding: 0 10px;
            height: 100%;
            .text{
                margin: 0 5px;
            }
            .close {
                visibility: hidden;
            }
            //&代表同级
            &.selected {
              a {
                color: #409eff;
              }
              i {
                color: #409eff;
              }
              background-color: #f5f5f5;
            }
        }
        }
        .tab:hover {
            background-color: #f5f5f5;
            .close {
               visibility: inherit;
               cursor:pointer;
               color: #000;
            }
        }
    }

    .header-right {
        .user-name {
            margin-left: 10px;
        }
    }
    a{
        color: #333;
        font-size: 15px;
    }

</style>